Centrifugal controller for adding-machines.



J. HUNTER & H. KUNTZLER.

CENTRIFUGAL CONTROLLER FOR ADDING MACHINES.

APPLICATlON mm DEC.29, 1908.

1 1 96,36 3. Patented Aug. 29, 1916.

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J. P. HUNTER & H. KUNTZLER. CENTFHFUGAL CONTROLLER FOR ADDING MACHINES.APPLlCATION FILED DEC.29, 190B.

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J. P. HUNHR H. KUNTZLER. CENTRIFUGAL CONTROLLER FOR ADDlNG MACHINES.APPLICATION FILED DECILLJ. 1901 1,196.363. lutvntvdAug. 29,1916.

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UNITED STATES PATENT OFFICE.

JOHN PIRRONG HUNTER AND HENRY KITNTZLER, OF WILKES-BARRE, PENNSYLVANIA,ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO ADDER MACHINE COMPANY,

A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Application filed December 29, 1908. Serial No. 469,758.

To all whom it may concern lie it known that we, JOHN PIRRONG HUNTER andIIENRY Kil'N'rzLnR, citizens of the United States, and residents ofWilkes- Barre, Luzerne county, Pennsylvania, have invented certain newand useful Improvements in Centrifugal Controllers for Adding-Machines,of which the following is a specification.

This invention relates to controllers for the motor actuators of addingmachines and similar mechanisms and its novelty consists in theconstruction and adaptation of the parts as will be more fullyhereinafter described.

Vhen motors are employed to supply power to machines of this class, andespecially when they are energized from alternating currents, thereoccur variations in the speed of the motor. It is expedient, if notactually necessary, that the motor should not be coupled to the addingmachine to actuate it until a certain speed of rotation has beenattained, and it is the purpose of this invention to prevent suchcoupling from taking place until the proper speed has been arrived at.

Attempts have been made to accomplish this purpose by electrical means,that is, by providing a resistance or some similar electricalcontrivance which would not permit the coupling mechanism to beenergized until the current supplied to the motor had developed acertain voltage, but this form of device introduced foreign factors intothe problem and made its operation uncertain.

By means of the present invention a simple, efficient positivemechanical controller is provided and there is no danger of its failureto operate from any external cause.

In the followin specification, the invention is shown an described asapplied to the Wales adding machine, such as is shown, for instance, inUnited States patents to Vales, 797,032, August 15, 1905; McFarland,842,232, January 29, 1907, and Mc- F arland and Wales, 880,157, February28, 1907, and to a peculiar driving mechanism attached thereto, but itwill be understood that it is equally applicable to other addingmachines and other forms of driving mechanism and power transmittingdevices.

The power transmitting mechanism referred to is described and claimed inLetters Patent of the United States, No. 902103, issued to Charles N.McFarland October 28, 1908, and in brief, comprises a drum actuated froma continuously rotating motor, a shaft on which the drum is looselymounted to revolve, a carrier rigidly mounted on the shaft, a controlring mounted to rotate on the shaft and provided with projecting toes, adriving arm eccentrically mounted onthe carrier, means for placing aconstant tension on the driving arm, a connection between the controlring and the driving arm, a holder adapted normally to keep the drivingarm out of contact with the revolving drum inside of which the carrieris mounted, means for interrupting the function of such holdercomprising a depressible actuator key, and means also whereby thefunction of the holder may be automatically restored. In effect, whenthe actuator key of that "mechanism is depressed, the clutch shaft isrotated a fraction of a revolution and such motion is adapted to betransmitted to the operative mechanism of the adding machine.

The means intermediate the drum shaft of the power transmittingmechanism, and the operative mechanism of the adding machine,hereinafter described, is different from that described in the patentabove referred to and forms the subject matter of another applicationfor Letters Patent of the United States, filed Dec. 28, 1908, Serial No.469,529.

In the drawings, Figure 1 is a side elevation and partial verticalsection of a device embodying our invention; Fig. 2 is a miniature view,showing the power transmitting mechanism disconnected from the addingmachine and replaced by a handle; Fig. 3 shows the same parts as Fig. 1,but with the rack bar at the end of a stroke, and Fig. 3 shows themethod of disconnecting the rack bar from the operative rock shaft ofthe adding machine. Fig. 4 is a detail front elevation of thecentrifugal governor, partly broken away, to show the method of mountingthe independent sectors. Dotted lines show the positions of the sectorswhen expanded by centrifugal force. Fig. 5 is a detail rear elevation ofthe disk, relatively to which the sectors slide; Fig. (i is a sectionalview through the governor; Fig. 7 is a detail front view of one of thesectors alone: and Fig. 8 is a sectional view through a sector.

Referring to the drawings, 1 isthe base of an adding machine and 2 is apart of one of its side frames of which there are two, one on each sideof the machine. 3 is an operative rock shaft transmitting power to themechanism of the adding machine. Secured to this shaft, or moving inharmony with it, is a lever. indicated at 4 and provided with a stopfoot 5 to limit its movement in one direction.

Mounted on a pair of elbow levers 20, which move together, is adepressible actuator bar 21 adapted to be moved vertically. The levers20 are adapted to swing on pivots 22 projecting from the frame 2 of themachine. At their lower extremities they are coupled by a link 23 sothat they will move together, and to one of them at 24, is pivoted alink 25 which in turn is pivoted to a crank 26 rigidly secured to a rockshaft 27 to the other end of which is secured a crank which in turn, ispivoted to a vertically placed actuator link 29 pivoted on a crank 30mounted on a rock shaft 31, which in turn, is connected to the device bywhich the function of the holder of the ])ower-transmitting mechanism isinterrupted and restored. This train of mechanism comprises the motoractuator.

A motor is indicated at 100. A shaft 101 moved therefrom, as-hereinafterdescribed, carries a worm 102 in mesh with a worm gear 103 rigidlysecured to a shell so that the gear and shell shall rotate on anintermediate clutch shaft 105 on which they are loosely mounted. Acontrol ring provided with projecting toes 114 and slots 121 is mountedon the shaft 105. A holder consisting of an arm 151 is adapted, by meansof a stud 152 mounted near its end, to engage the toes 114, and it isprovided with an arm 153 having a restoring roller 154. In the PatentNo. 902,103, abox e referred to, the coupling and clutch mechanism isfully described and such description need not be repeated here. It issufficient to say that when the actuator bar 21 and link 29 aredepressed, the clutch shaft is revolved a fraction of a revolutiondepending on the number and position of the toes 114.

A lock, which forms the subject matter of another application forLetters Patent, filed June 30, 1908, on which Letters Patent of theUnited States, No. 1,080,515 issued Dec. 2, 1910, comprises a lockingarm formed of an upward extension of the crank 26. This arm is providedwith a slot 32 adapted to engage a pin 33 projecting from the frame ofthe machine to limit the movement of the arm which has a laterallyprojecting flange 31. Loosely mounted to oscillate at a convenient pointnear the arm 26, for instance, on the frame 2 is a cooperating lockplate 35 having a projecting arm 36 with a lateral flange 37 adapted toengage the flange 34, and a second arm 38 having an inwardly extendingflange 39 adapted to be engaged by the stop foot The lock plate is alsoprovided with a slot 10 adapted to engage a pin -11 projecting from theframe 2. A spring 43 is adapted to move the arm 30 downward and the arm28 upward.

The motor 100 is provided with an armature shaft 1000 which is adaptedto be detachably secured to the auxiliary worm shaft 101 by means of a.coupling. In the form of device shown. this consists of a sleeve securedto the shaft by a pin or bolt, and which sleeve is recessed to engage apin projecting radially from the shaft 1000. This is a form of couplingwhich permits of a quick engagement and disengagen'ient of the twoshafts. Any suitable form of coupling may, however, be used.

The power transmitting mechanism is mounted in a sub-frame and theclutch mechanism itself is arranged within a shell or inclosure toprotect it from dust and injury. The frame is adapted to be detachablysecured to the base 1 of the machine by bolts or screws, or in any othersuitable manner.

Mounted on the shaft 105 and turning with it is a crank 00 having aplurality of arms 61 each provided at their outer extremities withsuitable rollers 62.

Secured to a convenient member of the operative mechanism of the addingmachine, for instance, the operative rock shaft 3 is a gear 370 providedwith teeth 371, so that when the gear is oscillated, the shaft 3 isoscillated by it.

Mounted intermediate the multiple crank 60 and the gear 370, is aloosely moving member 65 driven from, but not connected to the crank 60and having teeth meshing with the gear 371 to transmit the power fromthe shaft 105 to the shaft 3 when the actuator bar 21 is depressed andthe clutch mechanism is rendered operative. This member 65 i in the formof a bar having a slot 66 adapted to engage a supporting and guidingroller 63 pivoted to the clutch inclosure. It also is provided with adepending arm 67 adapted to be engaged on its inner face by the rollers62 on the crank 60, whereby it is moved in the direction indicated bythe arrow in Fig, 1. On its upper front edge it is provided with teeth69 constituting a rack adapted to engage the teeth 370 of the gear 371.

Arranged beneath the bar 65 or on the side opposite to the teeth 69 is asupport and guide, consisting of a bracket carrying a roller 64 adapted'to engage the edge of the bar 65, and the latter rests upon it. Thisconstruction is simple and tends to secure steadiness of motion in thebar 65.

' Secured to the end of the shaft 101 is the controller or lockcomprising the following parts: A hub '7 rigidly fastened to the shaftby a key, pin, or other suitable means. is provided with a disk 70having a plurality of radial slots 71 symmetrically placed near itsperiphery. The hub is grooved at 72 and provided with rods 73 (Figs. 5and 0) crossing the groove within the hub. The hub is also provided onthe other side of the disk 70. with radial pins 74 identical in numberand substantially in line with the slots 71. Arranged around the hub 7are a plurality of sectors or locking members 75 corresponding in numberwith the slots 71. Each seetor is provided with a radial recess 70 toreceive one of the radial pins 74, and each is provided with a threadedaperture 77 (Fig. 7) in which is secured a screw 78 adapted to passthrough the corresponding slot 71, and the end of which screw isconnected to its corresponding cross rod 73 by a coiled spring 79. Eachsector or locking member has an outwardly extending peripheral flange700, all of the flanges forming inefl'ect, a. complete annular flange.

Mounted on the rock shaft 31 is a locking arm 290 with an inwardlyprojecting tip 291. and so arranged with respect to the arm 151 thatwhen the roller 15; on this arm is engaged with one of the toes 11 thenthe tip 291 rests against theannular flange 700 of the controller, andso long as this engagement continues none of the parts can be moved. If,however. the sector or locking member 75 which is in contact with thetip 291 is moved radially outward. then this tip 291 can be moved intoward the motor and the arm 151 can be rocked by the shaft 31 todisengage the roller 152 from the toe 114 and permit the countershaft105 to rotate the crank 00 to move the rack (15 to actuate the rockshaft 3 of the machine.

Normally the parts are in the positions shown in I igs. 1 and 3 when themotor is idle and if the bar 21 is depressed. the machine does notoperate because the arm 151 cannot be disengaged from the toe 111 of thecontrol ring 113. If. however. the speed of the motor 100 is increasedand the shaft 101 is rotated more rapidly. then as the hub T and disk 70revolve more rapidly. the sectors or locking members 75. under theinfluence of centrifugal force. move radially outward on theirrespective pins 74 and against the restraining action of their springs79 until the sectional peripheral flange 700 is in such a position thatit no longer affords an obstacle to the inward movement of the tip 291of the locking arm 290, and if now the actuator bar 21 is depressed,then the arm 151 can be rocked to release its roller 152 from the toe114 of the ring 113, and the motor can be, and is. coupled through theclutch mechanism counter shaft 105 and rack 05 to the main shaft 3 ofthe adding machine. So long as the shaft 101 is rotated at a speedsuflicient to throw the sectors 75 centrifugally out of the path of the.tip 291 the actuator bar is operative, but when'the speed isinsulticient for that purpose springs 79 retract the flanges 700 of thesectors to bring them into the path of the arm 290 to lock the arms 290and 151 against operation and render the actuator bar inoperative. Theinner edge 701 of the flange 700 is made sloping and so is the innerupper edge 292 of the tip 291 in order to facilitate the disengagementof the tip and flange as the sectors 75 move inwardly radially.Obviously the controller locks the starting key or actuator 21- againstoperation when the motor is idle.

What \veclaim as new is:

1. The combination with a machine; a motorto drive the same: a normallyidle clutch to couple the machine and motor:' and an actuator to effectthe operation of said clutch: of m ans adapted to prevent effectiveoperation of the actuator until the inotor has attained a predeterminedspeed.

comprising a rock shaft turned by the actuator during the couplingoperation; an arm turning with the shaft: and a rotary stop connectedwith the motor and normally interposed in the path of the arm. andadapted to be. shifted by centrifugal force, out of said path.-

2. The combination with a machine: a motor to drive the machine; meansto couple the motor and machine: and an actuator to control said means;of means to prevent the operation of the actuator until the motor hasattained a prtuletermined speed. coinprising a revolving stop actuatedfroni the motor and normally interposed in the path of the actuatormechanism. and adapted to be shifted by centrifugal force out of saidpath.

3. The combination with a clutch: and controlling means therefor; of acentrifugal device to limit the movement of said controlling means. thesaid device comprising a hub: radial guides secured thereto: a disk;locking members adapted to move outwardly on the guides and along thedisk: and a spring secured to each locking memher and the hub.

4. The combination with a clutch: and controlling means therefor: of acentrifugal device to limit the movement of said controlling means. thesaid device comprising a huh; radial guides secured thereto; a disk 139locking members adapted to move outwardly on the guides and alongthedisk, the disk having slots therein. one for each locking member; apin on each wing adapted to move in its slot; and a spring secured toeach pin and the hub.

The combination with a clutch; and controlling means therefor; of acentrifugal device to limit the movement of said controlling means, thesaid device comprising a hub; radial guides secured thereto; a disk;locking members adapted to move outwardly on the guides and along thedisk, the disk having slots therein, one for each locking member; a pinon each wing adapted to move in its slot: and a spring secured to eachpin and the hub on that side of the disk opposite the locking members.

6. The combination with a machine; a motor; and mechanism whereby theymay be coupled together, including a shaft; of an arm moving with theshaft; a centrifugal controller adapted to be rotated from the motor,and including a member normally adapted to contact the arm to preventits movement, said member adapted to be moved out of contact with thearm by centrifugal force when the controller is rotated.

7. A machine, a motor, mechanism whereby they may be coupled together,including a shaft. an arm moving with the shaft; and a centrifugalcontroller driven from the. motor confprising a plurality of membersradially movable under the action of centrifugal force, and eachprovided with a flange adapted normally to contact with the arm toprevent its movement.

8. A centrifugal controller comprising a plurality of yieldingly heldwings. each provided with a flange constituting as a whole a substantialannulus, in combination -with an arm adapted to contact with the annuluswhen the controller is at rest, and to move within the annulus when theeffective diameter of the latter is increased by centrifugal force.

9. The combination with a machine; and an operative. rock shaft: of acontinuously running motor; a mechanism between the motor and said shaftwhereby they may be temporarily engaged to actuate the machine: a holdernormally adapted to prevent said engagement; an actuator adapted to movesaid holder out of normal position to per 'mit such engagement: andmechanical means adapted to prevent such movement until the motor hasacquired a predetermined speed.

10. The combination with the operative rock shaft of an adding machineor similar mechanism. of a continuously running motor. a mechanismbetween the motor and said shaft whereby they may be temporarily coupledtogether to actuate the machine, a holder normally adapted to preventsaid coupling, an actuator adapted to move said holder; and mechanicalmeans adapted to prevent such movement until the motor has acquired apredetermined speed, and to automatieally restore the parts to theiroriginal positions when the speed is subsequently reduced.

11. A centrifugal controller comprising a plurality of yieldingly heldlocking members, each provided with a peripheral flange constituting asa whole a substantial annulus, in combination with an arm adapted tocontact with the annulus when the controller is at rest, and to movewithin the same when thelocking members are moved radially bycentrifugal force, the arm and flanges having sloping contactingsurfaces whereby the radially inward movement of the locking memberswill automatically disengage the arm therefrom.

12. The combination with a machine: a

motor; and coupling mechanism therefor;

of an actuator, including a swinging arm; and a device rotated by themotor, including a member normally adapted to lie in the path of theswinging arm, said member adapted to be moved out of the path of the armby centrifugal force.

13. The combination with a machine; a motor; and coupling mechanismtherefor; of an actuator, including a swinging arm; and a device rotatedby the motor. including an annulus formed of separable sectors movableradially under centrifugal force and normally in contact with the arm toprevent effective operation of the actuator.

14. The combination with a machine: a motor therefor: and intcrmittentmeans to effect the transmission of power fr an the motor to themachine; of an actuator to control the operation of the intermittentmeans: and a centrifugal device driven by the motor and adapted directlyto prevent ellective operation of the actuator when the motor is turningat less than a predetermined speed.

15. The combination with a machine. of a motor therefor, a clutchintcrnu-diate the said motor and machine and. having an intermittentaction, manual means to cause the actuation of the clutch. and meansgoverned by the motor to prevent the manipulation of said manual means.

10. In combination. a motor with rotating shaft. a clutch,clutch-actuating means, an auxiliary shaft. a coupling connecting theauxiliary and motor shafts. a worm carried by the auxiliary shaft todrive the clutch,

and a centrifugal device mounted upon the,

auxiliary shaft and adapted to control the cllatch-actuating means.

17. In combination. a motor. a clutch, clutch-actuating means. a shaftadapted to be connected with the motor and be driven thereby. a wormmounted upon the shaft to drive the clutch. and a centrifugal dcviccmounted upon the shaft and adapted to control the clutch-actuatingmeans.

18. The combination with a machine; of a shaft; a centrifugal devicemounted on the shaft; a coupling on the shaft to connect it with asource of power: a worm on the shaft intermediate the centrifugal deviceand the coupling; a worm wheel driven by the worm: and clutch mechanismintermediatethe worm wheel and machine, and controlled by thecentrifugal device.

11!. The combination with a machine; of a shaft: a motor: a coupling atone end of the shaft to releasably connect it with the motor: a worm onthe shaft: a worm wheel driven by the worm; a clutch mechanisminterposed between the worm wheel and machine: and a centrifugal deviceon the shaft aml adapted to control the actuation of the clutchmechanism.

'30. The combination with a machine: a motor: transmission mechanismbetween the motor and the machine: and an actuator to control thetransmission mechanism: of a centrifugally operated member also drivenby the motor: and means connected with the actuator and adapted tocontact the centrifugally operated member. to lock the actuator againstoperation when the motor is idle.

.21. The combination with a machine; a motor: intermittent drivemechanism between the motor and the machine: and an actuator to controlthe drive mechanism: of a centrifugally operated means driven by themotor to lock the actuator against operation.

2; The combination with a machine: a motor to drive the machine; and anactuator to control the connection between the motor and the machine; ofa centrifugally operated lock driven by the motor. and comprising aseries of expansible members having arcuate flanges adapted to form asubstantially unbroken annulus when the. lock is at rest. to lock theactuator against operation.

22%. The combination with a machine: a motor: coupling mechanism betweenthe motor and the machine: a restraining member to normally hold thecoupling mechanism idle: and an actuator to trip the restraining member:of a centrifugally operated lock driven by the motor and adapted. whenat rest. to prevent operation of the actuator.

it. The combination with a machine: a motor connected with the machine;and an actuator to control the operativeness of the connection; of amotor-controlled lock for the actuator. including a series ofcentrifugally operated. expansible members. radial guides on which themembers are shiftable. and flanges on the members to form a substantialannulus when the members are at rest; and an arm connected with theactuator to strike the annulus. 1

25. In combination, a driving-member, a driven member, a normallyrestrained clutch therebetween, manipulative means for releasing theclutch. and a lock for said means comprising a revolving stop actuatedfrom the driving member normally interposed in the path of said meansand adapted to be moved therefrom by centrifugal force.

26. In combination, a clutch, controlling means therefor, a centrifugaldevice to limit the movement of said controlling means, thesaid devicecomprising a hub, radial guides secured thereto, a disk, locking membersadapted to move outwardly on the guides and along the disk and a springsecured to each locking member and the hub.

27. In con'ibination, a clutch, controlling means therefor, acentrifugal device to limit the movement of said controlling means, thesaid device comprising a hub, 'adial guides secured thereto, a disk,locking members adapted to move outwardly on the guides and along thedisk, slots in the disk, one for each wing. a pin on each locking memberadapted to move in the slot and a spring secured to each pin and thehub.

28. In combination, a clutch, controlling means therefor. a centrifugaldevice to limit the movement of said controlling means, the said devicecomprising a hub, radial guides secured thereto, a disk, locking membersadapted to move outwardly on the guides and along the disk, slots in thedisk, one for each locking member, a pin on each locking member adaptedto move in the slot and a spring secured to each pin and the hub on thatside of the disk opposite the locking members.

29. In combination, a driving member, a driven member, mechanismswhereby said members may be coupled together, including a shaft. an armmoving with the shaft and a centrifugal controller adapted to be rotatedfrom the driven member and provided with a member adapted normally tocontact with the arm to prevent its movement and to be moved out ofcontact therewith by centrifugal force when the controller is rotated.

30. In combination. a driving member. a driven member. a mechanismbetween said members whereby they may be. temporarily engaged. to drivesaid driven member. a holder normally adapted to prevent said engagement and an actuator adapted to move said holder out of normalposition to permit such engagement and mechanical means adapted toprevent such movement until the driving. member has acquired a predetermined speed.

31. In combination, a driving member. a driven member. a couplingmechanism for said members. a manually operated actuator thereforincluding a swinging arm, and a locking member rotated by said drivingmember, said lockingfmember being nor-' mally disposed in the path ofthe swlnging arm and adapted to be moved out of said path by centrifugalforce.

32. In combination, a driving member, a driven'member, a couplingmechanism for said members, a manually operated actuator thereforincluding a swinging arm, and a device rotated from the driving member,including an annulus formed of separate sectors movable radially undercentrifugal force and normally preventing the arm and the actuator frommoving to an operative position.

33. In combination, a driving member, a driven member, intermittentmeans for the transmission of movement from the driving men'ibe-r to thedriven member, an actuator to control the operation of said intermittentmeans, and a centrifugal device driven by the said driving member andadapted directly to prevent movement of the actuator when the drivingmember is not moving at a predetermined speed. I

34. The combination with a machine; a motor to drive the machine; atransmission mechanism including an intermittently operable connection,between the motor and the machine; and manually-controlled means tocause the actuation of the intermittently operable connection; of meanscontrolled by the motor to prevent the effective operation of'themanually-controlled means until the motor has attained a sufficientspeed.

\Vitness our hands this 22nd day of December, 1908, at W'ilkes-Barre,Pa.

JOHN PIRBONG HUNTER HENRY KUNTZLER. \Vitnesses:

\VILLL-ui R. Baum, ALLAN C. MCDONNELL.

